WATCH: 9/11 Anniversary Service Held at Ground Zero on 9/11 Anniversary

Watch the beginning of the 9/11 service held at ground zero, including a special rendition of the national anthem by the Brooklyn Youth Chorus. (Published Sunday, Sept. 11, 2016)

What to Know

Ground zero memorial has seen a spike in interest from travelers.

Interest in the memorial increased by 425 percent in the past year.

The second most "trending" attraction in the country was the Fort Sumter National Monument in South Carolina.

Interest in New York's ground zero memorial has spiked - more than interest in any other attraction in the country, TripAdvisor reports.

The travel planning site released data on the most "trending" attractions in the country on Tuesday.

It found interest in visiting the ground zero memorial in downtown Manhattan had increased by 425 percent over the last year - making it the United States attraction with the greatest increase in traveler interest over the past year.

The ground zero memorial is a tribute to the nearly 3,000 people killed in the terror attacks of Sept. 11, 2001, at the World Trade Center site.